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Problems With RFID - Technovelgy
Technical problems with RFID
Problems with RFID Standards
RFID has been implemented in different ways by different manufacturers; global standards are still being worked on. It should be noted that some RFID devices are never meant to leave their network (as in the case of RFID tags used for inventory control within a company). This can cause problems for companies.
Consumers may also have...
Advantages of RFID Versus Barcodes - Technovelgy
Advantages of RFID Versus Barcodes
RFID tags and barcodes both carry information about products. However, there are important differences between these two technologies:
Barcode readers require a direct line of sight to the printed barcode; RFID readers do not require a direct line of sight to either active RFID tags or passive RFID tags .
RFID tags can be read at much greater distances; an RFID reader can pull information from a tag at distances up to 300 feet. The range to read a barcode is much less, typically no more than fifteen feet.
RFID readers can interrogate, or read, RFID tags much...
How RFID Works - Technovelgy
How does RFID work? A Radio-Frequency IDentification system has three parts:
A scanning antenna
A transceiver with a decoder to interpret the data
A transponder - the RFID tag - that has been programmed with information.
The scanning antenna puts out radio-frequency signals in a relatively short range. The RF radiation does two things:
It provides a means of communicating with the transponder (the RFID tag) AND
It provides the RFID tag with the energy to communicate (in the case of passive RFID tags ).
This is an absolutely key part of the technology; RFID tags do not need to contain batteries, and can therefore remain usable for very long periods of time...
What is RFID? - Technovelgy
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What is RFID?
RFID stands for Radio-Frequency IDentification. The acronym refers to small electronic devices that consist of a small chip and an antenna. The chip typically is capable of carrying 2,000 bytes of data or less.
The RFID device serves the same purpose as a bar code or a magnetic strip on the back of a credit card or ATM card; it provides a unique...
Related topics : radio frequency identification device rfid technology / radio frequency identification device rfid / credit card companies using rfid technology / rfid card reader device / rfid tag and reader working
Passive RFID Tag (or Passive Tag) - technovelgy.com
Passive RFID Tag (or Passive Tag)
A passive tag is an RFID tag that does not contain a battery; the power is supplied by the reader. When radio waves from the reader are encountered by a passive rfid tag, the coiled antenna within the tag forms a magnetic field. The tag draws power from it, energizing the circuits in the tag. The tag then sends the information encoded in the...
Printing RFID Tags With Magic Ink: Science Fiction in the News
Printing RFID Tags With Magic Ink
Looking for a flexible RFID tag? Security technology like RFID devices , barcodes and smart cards are going to be smaller, more flexible and easier to manufacture responsibly thanks to a metal printing technology developed by QinetiQ Metal Printing.
(From BBC: Magic Ink )
"The very basic principle is that you apply an ink to a surface that is water resistant, like a flexible plastic," Chris Bishop, general manager of QinetiQ Metal Printing (QMP), explained. "When you pass it through an electroless chemical solution, metal...
What can RFID be used for? - Technovelgy
What can RFID be used for?
RFID tags come in a wide variety of shapes and sizes; they may be encased in a variety of materials:
Animal tracking tags, inserted beneath the skin, can be rice-sized.
Tags can be screw-shaped to identify trees or wooden items.
Credit-card shaped for use in access applications.
The anti-theft hard plastic tags attached to merchandise in stores are also RFID tags.
Heavy-duty 120 by 100...
Field Programming - Technovelgy
Field programming is usually performed before the tag is installed on the product or object.
Obviously, the tag must have the appropriate circuitry to write the information it receives...